Active clinical trials for "Respiratory Tract Infections"

The primary objective of this study is to evaluate the effectiveness of ingesting an alkylamide-rich echinacea root product (Quick Defense, Gaia Herbs) for 2 days immediately following each onset of acute respiratory illness (ARI) symptomatology during a 12-week period in the winter and early spring in women. Hypothesis: Subjects randomized to Quick Defense compared to placebo over a 12-week period will experience reduced ARI symptomatology, both acutely during each ARI episode and collectively over the entire 12-week study period.

A phase 2, Randomized, Observer-blind, Multicenter, Dose-Ranging Study to Evaluate the Immunogenicity, Safety, and Tolerability of the plant-made H5 VLP Influenza vaccine adjuvanted with Alhydrogel or Glucopyranosyl-lipid adjuvant in squalene emulsion (GLA-SE), in healthy adults 18-60 years of age.

A phase I/II trial conducted in a single centre, observer-blind, randomized, dose-ranging, placebo-controlled study to evaluate the safety, tolerability, and immunogenicity of a single intramuscular injection of plant-based Seasonal Quadrivalent VLP Influenza Vaccine administered to healthy adults 18-49 years of age. A total of one hundred and twenty (120) subjects will be randomized in four (4) groups of 30 subjects to receive one injection of either a low, a medium, or a high dose level of VLP of the quadrivalent VLP influenza vaccine or the placebo preparation (100 millimolar (mM) phosphate buffer + 150 mM sodium chloride (NaCl) + 0.01% Tween 80).

The aim of the intervention is to examine the effect of a combination of the two bacterial strains BB-12 and LGG, provided for 6 month, on the prevalence of infections and allergic manifestations in small children, and how a combination of BB-12 and LGG affects the immune system, gastrointestinal tract and the microbiota. Children are enrolled during 2 winter seasons.

The primary goal of this project is to determine whether behavioral training in mindfulness meditation or moderate intensity sustained exercise will lead to reductions in acute respiratory infection (ARI) illness, such as common cold and influenza like illness. Specifically, this project aims to: Determine whether an 8-week training program in mindfulness meditation, as compared to the control group, will lead to significant reductions in incidence, duration, and severity of ARI illness. Determine whether an 8-week training program in moderate intensity sustained exercise, as compared to the control group, will lead to reductions in incidence, duration, and severity of ARI illness. Assess whether any observed reductions in ARI illness are accompanied by fewer ARI-related health care visits and less time lost to productive work (reduced absenteeism). Compare the potential benefits of mindfulness meditation to those from moderate intensity sustained exercise. Discern potential mediating factors and causal pathways that might help explain how these interventions lead to improved ARI illness-related outcomes. The investigators' preliminary findings suggest substantial benefit of these interventions in terms of reduced incidence, duration and severity of ARI illness, with corresponding reductions in days of work lost to illness. If the proposed research confirms these findings, there will be major implications for public and private health-related policy and practice, as well as for scientific knowledge regarding health maintenance and disease prevention.

Vitamin D can be made in the skin by exposure to sunlight and can be found in certain foods. Vitamin D levels are alarmingly low in many North American children. Several health issues have been linked with low vitamin D. These include colds caused by viruses and asthma attacks. However, no study has determined whether vitamin D supplementation can reduce the risk of these conditions in young children where they are most common and most severe. The goals of this study are to determine whether wintertime high dose vitamin D supplementation of preschoolers can prevent colds and asthma attacks. The investigators also aim to work out how much money would be saved by the health care system and society if preschoolers were routinely supplemented with Vitamin D during the winter. The investigators believe that preschoolers receiving 'high dose' vitamin D supplementation during the wintertime will be less likely to have colds, asthma attacks, and low vitamin D levels and will be less likely to use the medical system and keep their parents away from work.

The aim of this study is to evaluate the usefulness in Russian general practice of C-reactive protein testing in patients with acute cough or lower respiratory tract infections. In addition to studying the effect of C-reactive protein testing on the prescription of antibiotics, the purpose is to find out whether the frequency of referral to radiography could be reduced.

To assess protection against early life infections through supplementation of mothers during pregnancy to the newborns' growth, morbidity, immune status intra and extra-uterine.

The primary objective is to assess the safety and tolerability of two consecutive doses of plant-based H5 VLP, (H5N1) pandemic influenza vaccine combined with Alhydrogel®, given 21 days apart, at three dose levels: 5µg, 10µg and 20µg., compared to the placebo, and combined with Alhydrogel®.

The overarching goal of this project is to determine whether mind-body practices such as meditation or exercise can reduce the public health burden of acute respiratory infection. A major secondary goal is to determine whether mindfulness meditation or moderately strenuous exercise can enhance immune processes such as antibody response to influenza vaccination (flu shots). Finally, we want to investigate the influence of stress, optimism, anxiety and positive and negative emotion on immunity and resistance to respiratory infection.